How to regex match the opposite of what you’re searching (if that makes sense)
ps: happy new year.
This regex will match any string containing “MyString”
‘#MyString#’
This regex will be the opposite of the above, ie: matching any string that doesn’t contain “MyString”
‘#^((?!MyString).)*$#i’
Apparently regex is not good at doing these searches, so try to avoid.